diff options
Diffstat (limited to 'mew.scm')
| -rw-r--r-- | mew.scm | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/mew.scm b/mew.scm index 51c3e47..261c389 100644 --- a/mew.scm +++ b/mew.scm @@ -17,7 +17,7 @@ one-of op op* per prn proj puts range rep - sing? search seq set set-at str slurp + scan scan-right sing? search seq set set-at str slurp tally-accumulator tbl time while uniq-accumulator unlist until @@ -828,6 +828,19 @@ (loop (+ i (get t (get haystack (+ i ln) #f) (inc ln))))) #f))))))) + (define (scan kons knil . lists) + (reverse (apply fold (lambda (elt acc) + (cons (kons elt (car acc)) acc)) + (list knil) + lists))) + + (define (scan-right kons knil . lists) + (apply fold-right (lambda (elt acc) + (cons (kons elt (car acc)) acc)) + (list knil) + lists)) + + (let ((old-repl-prompt (repl-prompt))) (repl-prompt (lambda () (let ((old-prompt (old-repl-prompt))) |